Which OpenType layout engine does FC use?
Posted: Mon Jul 10, 2017 10:20 pm
Greetings,
In Preview Tool (F8): Which OpenType layout engine does FC employ to interpret the GSUB/GPOS tables? Uniscribe? Harfbuzz? OTLS? OTComp? Does FC roll its own?
The question is important because some tools - like HarfBuzz - are quite buggy when it comes to processing individual lookups in long tables..
(Tangent: Do the Uniscribe and HB api's even allow one to turn off language-specific shaping and only process lookups?)
In any case, I'm unable to significantly test Preview Tool until RTL reading-order support is added to the view field. (See feature request in the other subforum.)
Thanks in advance! and
Respects
Hermes14
In Preview Tool (F8): Which OpenType layout engine does FC employ to interpret the GSUB/GPOS tables? Uniscribe? Harfbuzz? OTLS? OTComp? Does FC roll its own?
The question is important because some tools - like HarfBuzz - are quite buggy when it comes to processing individual lookups in long tables..
(Tangent: Do the Uniscribe and HB api's even allow one to turn off language-specific shaping and only process lookups?)
In any case, I'm unable to significantly test Preview Tool until RTL reading-order support is added to the view field. (See feature request in the other subforum.)
Thanks in advance! and
Respects
Hermes14